Chapter 4, Lesson 4 Activity Sheet Answers
1.
The electron from
each hydrogen
atom feels an
attraction from the
proton in the other
atom.
The attractions bring the two
hydrogen atoms together and
the electrons are shared by
both atoms making a covalent
bond.
2. There has to be strong enough attraction by the protons in each atom for the
electrons in the other atom. And there must be room for the electrons on the outer
energy level of both atoms.
3. The electrons form a covalent bond which means that each electron can be near
two protons instead of just 1. In a covalent bond, the electrons are shared between
the two atoms.
4. A hydrogen molecule (H2) is made up of two hydrogen atoms sharing two
electrons on the first energy level. If another hydrogen atom comes along, the
electron from that hydrogen atom cannot be shared on the first energy level
because there is no room. It would have to be further away from the nucleus and
would not feel a strong enough attraction. Also, the electrons in the H2 molecule
would not feel a strong enough attraction to that one proton to move further away
from the two protons they are attracted to.
5.
The electrons in each hydrogen
atom feel the attraction of the
protons in the oxygen atom.
The electrons on the outer
energy level of oxygen feel the
attraction for the proton from
hydrogen.
The attractions bring the atoms
together in a covalent bond.
6. If another hydrogen atom comes along, the electron from that hydrogen atom
cannot be shared on the second energy level of oxygen because there is no room.
It would have to be further away from the nucleus and would not feel a strong
enough attraction. Also, the electrons already in the H2O molecule would not feel
a strong enough attraction to that one proton to move further away from the
protons they are already attracted to.
7. The bubbles that formed in the solution were Hydrogen gas (H2) and Oxygen gas
(O2).
8. More hydrogen gas was produced because each water molecule contains more
hydrogen than it does oxygen. In one water molecule, there are two hydrogen
atoms, while there is only one oxygen atom.
9. a
Electrons from each
oxygen atom feel an
attraction from protons
in the other atom.
10.
The attractions bring the
two oxygen atoms
together to make a
double covalent bond
which forms an oxygen
molecule from the two
oxygen atoms.
Initially, each Hydrogen atom has a single
outermost electron, while the carbon atom
has four outermost electrons.
Electrons within the hydrogen atoms and
the central carbon atom feel an attraction
from protons in the other atom.
11.
The attractions bring the atoms together to
form four covalent bonds. Each hydrogen
atom now has 2 electrons in its outer
energy level, while the carbon atom has 8
electrons in its outer energy level.
Initially, each oxygen atom has 6
outermost electrons, while the
carbon atom has four outermost
electrons.
Electrons within the oxygen
atoms and the carbon atom feel an
attraction from protons in the
other atom.
The attractions bring the atoms
together to form two double covalent
bonds. Each atom now has 8
electrons in its outer energy level.